JP4186596B2 - High frequency cooking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-frequency cooking device that heats an object to be heated with high frequency and steam.
[0002]
[Prior art]
Conventionally, this type of high-frequency cooking device includes a stage 2 for heating an object having a groove 1 for containing water as shown in FIG. 5 (see, for example, Patent Document 1), and operates a magnetron 3. By heating, the object to be heated is generated while generating water vapor in the heating chamber 4, and the ultrasonic humidifier 5 as shown in FIG. 6 (see, for example, Patent Document 2) is provided. There is one that heats an object to be heated in the heating chamber 7 while operating the magnetron 6 while operating the means 5 and operating the magnetron 6 while preventing drying.
[0003]
In addition, as a steam generator, a heating system such as a boiler type is used by directly or indirectly contacting a heating element with water, or a heating unit or a heated body such as a dropping type is used for a heating pump or a heated body. There are various things such as those that contact a small amount of water by sending water. Among them, there is a steam cooker described in FIG. 7 (see, for example, Patent Document 3) related to the cooker, and includes a water dropping means 9 for dropping a small amount of water in the tank 8, and a water dropping means 9. A heating element 10 that is located below and converts dripped water into water vapor, a temperature sensor 11 that detects the temperature of the heating element, and a path 13 for conveying water vapor generated by the heating element into the heating chamber housing 12 are provided. In addition, water vapor is generated by controlling the water dropping means 9 in accordance with the temperature of the heating element.
[0004]
Further, as a technique for transporting water using thermal energy, there is a heat transport pump typified by a coffee maker described in JP-A-6-245863 as shown in FIG. When the heater 15 is energized, water in the pipe 16 boils as hot water, generates steam and bubbles, and rapidly expands in volume. At this time, a check valve is provided on the water storage tank side of the pipe 16 so as not to flow backward, and hot water is discharged from the hot water outlet 17.
[0005]
[Patent Document 1]
JP-A-5-52342 [Patent Document 2]
JP-A-3-52342 [Patent Document 3]
JP-A-8-105628 [0006]
[Problems to be solved by the invention]
However, as described above, the magnetron used for steam generation is not energy efficient, and depending on the output conditions of the high frequency and the conditions of the object to be heated, heat may enter the object to be heated before the steam is generated. There was no cooking in which the object to be heated kept the optimum amount of moisture. In addition, a device that generates high frequency while generating mist with ultrasonic generator means that high frequency does not act on the mist, so that moisture adhering to the object to be heated is heated at high frequency. Was not given from the outside of the object to be heated, and was not the optimal cooking method with the image of “moist” or “fluffy”.
[0007]
On the other hand, in the steam generation configuration such as the boiler type, it takes time to generate steam, and it is considered that cooking takes time. In addition, in the configuration such as the above-described dropping type, it is necessary to control the water dropping means and the heating element in combination with each of them. In addition, in order to transmit heat energy to water in a short time, it is related to the size of the contact area for transmitting heat energy, but compared to generating steam from water and generating steam from hot water, By generating steam from the gas, it can be vaporized in a short time.
[0008]
Furthermore, in order to evaporate without leaving moisture in the evaporation section, it is necessary to increase the heat capacity of the evaporation section or to operate the heating section after stopping the supply of water, but if the heat capacity of the evaporation section is increased The rise time until the steam is generated becomes longer, and the latter requires a method of detecting the temperature.
[0009]
Furthermore, in a coffee maker, it is used for the purpose of generating and transporting hot water, and even when steam is ejected from the piping section, it has not been possible to generate steam for a long time.
[0010]
The present invention solves the above-described conventional problems, and includes a steam generation means that generates steam from a hot water by heating when transporting water and generating steam from hot water, and a high-frequency generation means. Thus, an object of the present invention is to provide a cooking device that can apply heat energy from the inside and outside of the object to be heated and cook the original deliciousness of the object to be heated in a short time.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a heating chamber for storing an object to be heated, high-frequency generation means for generating radio waves to be supplied to the heating chamber, steam generation means for supplying steam to the heating chamber, high-frequency generation means, The steam generating means includes a water storage section that stores water, a hot water transport section that transports water supplied from the water storage section while heating, and an evaporation section that vaporizes the hot water transported by the hot water transport section. A heating unit that heats the water, and local boiling is generated inside the transport unit by heat transfer from the heating unit to transport water .
[0012]
According to the said invention, it is possible to give heat energy efficiently to water by heating, conveying the water of a water storage part. Also, by evaporating the heated hot water in the evaporation section, the amount of heat energy transferred for vaporization can be reduced by the amount previously raised, and the surface area of the vaporization section and the heat capacity of the vaporization section can be reduced. And heat dissipation loss can be reduced. Therefore, in addition to improving the thermal efficiency of steam generation, it is possible to generate steam in a short time. Eventually, by using both external heating with water vapor and internal heating using high frequency, the object to be heated can be “fluffy” and “moist”, and cooking can be performed in a short time with a much improved taste.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a heating chamber for storing an object to be heated, a high-frequency generating means for generating radio waves to be supplied to the heating chamber, a steam generating means for supplying steam to the heating chamber, a high-frequency generating means, and steam generation The steam generating means heats a water storage section that stores water, a hot water transport section that transports water supplied from the water storage section, and an evaporation section that vaporizes the hot water transported by the hot water transport section. A heating unit that performs local boiling inside the transport unit by heat transfer from the heating unit and transports water .
[0014]
And since it heats while conveying the water of a water storage part, heat transfer efficiency improves from the relationship of the temperature difference of a heating side and a heat receiving side compared with the time of heating while making it retain. Further, in the evaporation section, the amount of transmission can be reduced by the amount of heat energy raised in advance, and the viscosity of water is reduced, so that the contact area of the vaporization section and water is increased, and the heat transmission efficiency is improved. Moreover, it becomes possible to reduce the surface area of the vaporization part and the heat capacity of the vaporization part, and heat dissipation loss is also reduced. Therefore, in addition to improving the thermal efficiency of steam generation, it is possible to generate steam in a short time. Further, when heating of the heating unit is stopped, heat transfer to the transport unit is extremely reduced, and movement of hot water in the transport unit is stopped. Therefore, by controlling only the heating means, a vapor generating means capable of controlling the supply of liquid and the generation of vapor can be obtained. Therefore, it is possible to freely combine the control patterns of the steam generating means and the high frequency generating means that can be easily controlled, and it is possible to cook optimally for an object to be heated in less time.
[0015]
Furthermore, the combined use of the steam generating means that efficiently generates steam in a short time and the high frequency generating means can make the object to be heated "fluffy" and "moist", and the taste can be greatly improved.
[0018]
According to a second aspect of the present invention, the evaporating section is provided with a removable evaporating section cover having an opening for discharging steam.
[0019]
And when water is vaporized, a water droplet may be scattered depending on the surface state of the vaporization part or the state of hot water. Further, it is conceivable that scale components such as calcium and magnesium are deposited in the evaporating part and diffused in the heating chamber upon vaporization. However, by providing a cover on the upper side of the evaporating section, scattering of water droplets and scale components on the object to be heated is reduced. Moreover, since the evaporation residue such as the deposited scale is not directly visible, it can be kept clean and can be easily removed so that it can be cleaned.
[0020]
According to a third aspect of the present invention, the evaporation portion cover is made of a metal body material.
[0021]
The metal material reflects the radio wave generated from the high frequency generating means, so even if a little amount of hot water remains in the evaporation part during cooking or the like, the metal material does not act on the hot water and only the object to be heated is irradiated with the radio wave. Therefore, it can cook efficiently. Further, although the heating characteristics of the object to be heated by the high-frequency generating means are greatly affected by the shape of the heating chamber, since the radio wave does not enter the evaporation portion, the shape of the evaporation portion can be made flexible.
[0022]
The invention described in claim 4 is provided with an ejection guide capable of changing the ejection direction of the steam discharged from the opening.
[0023]
And by being able to change the jet direction of the steam with the jet guide according to the type and shape of the object to be heated, the steam can be filled around the object to be heated, and the entire heating chamber is filled with steam. Heat cooking is possible. That is, delicious cooking with the steam of the object to be heated can be performed efficiently without being affected by factors such as the size of the heating chamber. Furthermore, the cooking time can be shortened by combining with high frequency cooking.
[0024]
The invention according to claim 5 is an attachment in which the ejection guide can be attached and detached so that the ejection state of the steam can be changed.
[0025]
Then, the steam can be strongly sprayed on the surface of the heated portion or can be uniformly diffused into the heating chamber, and the steam according to the cooking menu can be used. Therefore, the result is optimal cooking. Moreover, cleaning can be easily performed by simply removing the ejection guide.
[0026]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0027]
(Example 1)
FIG. 1 is a configuration diagram of a high-frequency heating cooking apparatus according to the first embodiment of the present invention, FIG. 2 is a configuration diagram of steam generating means mounted on the high-frequency heating apparatus according to the first embodiment, and FIG. shows to external view of the ejection guide, FIG. 4 is an external view showing a spraying state of the main attachment steam jet unit in the first embodiment.
[0028]
The configuration will be described with reference to FIGS. Reference numeral 20 denotes a main body of the high-frequency heating device, which includes a heating chamber 21, high-frequency generation means 22 that radiates microwaves to the heating chamber 21, and steam generation means 23 that generates steam to be supplied to the heating chamber 21. It has been incorporated.
[0029]
Further, a door body (not shown) that opens and closes the opening on the front surface of the heating chamber 21 is pivotally supported on the main body 20 so as to be opened and closed, and is opened and closed when the heated object 24 is taken in and out of the heating chamber 21. The
[0030]
The high frequency generating means 22 is generated by a magnetron 25 disposed outside the heating chamber 21, an inverter power source 26 for operating the magnetron 25, an antenna 27 disposed on the bottom side of the heating chamber, and the magnetron 25. And a waveguide 28 for feeding the microwave to the antenna 27, and the magnetron 25 is forcibly air-cooled by a blower 29.
[0031]
The steam generating means 23 includes a water storage tank 30 detachable from the main body 20, a concave evaporation section 32 formed by aluminum die casting covering the sheathed heater 31, and an evaporation section from the water storage tank 30 via a check valve 33. And a pipe 34 for transferring hot water to 32. An opening 35 that is open to the atmosphere above the maximum water level of the water storage tank 30 is provided in the middle of the pipe 34. Further, a part of the pipe 34 positioned between the water storage tank 30 and the opening 35 is provided with a connection portion 36 so as to penetrate the aluminum die cast or connect to the aluminum die cast, and the generated heat generated by the sheathed heater 31. Is made of a material having a high thermal conductivity such as copper or aluminum.
[0032]
Reference numeral 37 denotes a metal evaporating section cover provided on the upper side of the evaporating section 32 and serving as a means for preventing water droplets from being scattered, and is provided with a detachable jet guide 38 so as to change the way steam is applied to the heated object 24. Yes. In addition, a detachable jet part attachment 39 capable of changing the steam jet state is provided at the tip of the jet guide. Reference numeral 40 denotes a control means for controlling the operation of the high frequency generation means 22, the steam generation means 23, and the like.
[0033]
Next, the operation | movement and effect | action which heat-cook the to-be-heated material 24 mounted in the heating chamber 21 with steam are demonstrated using FIGS. 1-4. When water is put into the water storage tank 30 and the water storage tank 30 is set in the main body 20, the valve body 30c biased by the valve seat 30b and closed by the spring 30a is pushed by the pin 30d to be opened. When this happens, water flows into the pipe 34 up to the same water level as in the water storage tank 30.
[0034]
In this state, when an operation button (not shown) is operated in order to generate steam in the heating chamber 21, the steam generating means 23 operates in the control circuit 40.
[0035]
That is, energization of the sheathed heater 31 is started, and heat generated by the sheathed heater 31 is transferred into the pipe 34 through the aluminum die cast and the connecting portion 36. In particular, in the pipe 34 in the vicinity of the connecting portion 36, a part of water causes local boiling, and the volume expands rapidly. However, a check valve 33 is provided on the water storage tank side 30 of the pipe 34, and the check valve 33 is closed by the internal pressure of the pipe 34 to prevent back flow, so that the hot water in the pipe 34 is released. It moves only to the mouth 35 side. In addition, since the opening 34 is provided in the pipe 34, the pressure in the pipe 34 is released to atmospheric pressure, so that hot water is not continuously supplied to the evaporation section 32 even if the evaporation section is positioned on the lower side. It is like.
[0036]
Moreover, since the evaporation part 32 is comprised as a part of aluminum die-casting, it is previously heated up to the temperature exceeding 100 degreeC with the heat generated by the sheathed heater 31. Therefore, the hot and cold water dropped and supplied intermittently from the pipe 34 to the evaporation section 32 changes to water vapor in an extremely short time.
[0037]
Further, since the connection portion 36 and the evaporation portion 32 are connected by aluminum die casting having a high thermal conductivity, when the evaporation portion 32 has hot water, the energy required for vaporization increases, and the amount of heat transferred to the pipe 34. Slightly decreases, the hot water supply interval to the evaporation section 32 is automatically lengthened, and if the hot water in the evaporation section 32 decreases, the amount of heat transfer to the connection section 36 slightly increases, and the hot water to the evaporation section 32 increases. Supply is automatically promoted. In other words, evaporation and hot water supply are balanced by using the heat generated by the sheathed heater 31 for the steam generation and the heat transfer pump via a material with high thermal conductivity such as aluminum die casting, which includes design elements. It becomes a state to do.
[0038]
Moreover, the heat loss from aluminum die-casting is extremely reduced by always contacting water or hot water through aluminum die-casting. Moreover, since the evaporation part is formed by aluminum die casting, even if the energization to the sheathed heater 31 is stopped, a slight heat storage is possible, and the start-up performance when cooking while repeatedly energizing the sheathed heater 31 is quick. It is also possible to do.
[0039]
When vapor is generated in the evaporation unit 32 in this manner, depending on the amount of hot water in the evaporation unit, hot water droplets may be scattered during vaporization, but the evaporation unit 32 is covered with a metal evaporation unit cover 37. As a result, high-temperature water droplets are not scattered inside the heating chamber 21, and steam is discharged only from the attachment 39 provided in the ejection guide 38 and fills the heating chamber 21. Further, the ejection guide 38 can change the direction in which the steam is ejected by providing a movable part, and can change the discharge form of the steam by replacing the ejection part attachment 39. Therefore, depending on the size of the object to be heated 24 in the heating chamber 21, it is possible to directly spray or indirectly spray the surface thereof, and to change the spray distance and the like. Therefore, it becomes possible to cook the article to be heated 24 with the thermal energy held by the steam before the heating chamber 21 is filled with the steam.
[0040]
In the first embodiment, the sheathed heater 31 is used as a heating element. However, the heating element may be a wire heater, a ceramic heater, or the like. In the first embodiment, heat is directly transferred, but it is also possible to have a structure that transfers radiant heat such as a Miraclone heater or a halogen heater. Furthermore, in the present Example 1, although local boiling is carried out by the heat transfer of a heating part, it is also possible to provide an exclusive heating means in piping.
[0041]
Next, the operation | movement and effect | action which heat-cook the to-be-heated material 24 mounted in the heating chamber 21 with a high frequency are demonstrated using FIGS.
[0042]
When an operation button (not shown) is operated to generate a high frequency in the heating chamber 21, the high frequency generation means 22 operates in the control circuit 40. That is, the magnetron 25 operates and the blower 29 operates to cool the magnetron 25. When the magnetron 25 is operated, the microwave generated from the magnetron output antenna 41 passes through the waveguide 28 made of a metal material and enters the heating chamber 21 from the bottom surface 42 made of a dielectric material. At this time, the traveling direction of the microwave is changed by the antenna 27, and the microwave is irradiated from various directions to the object to be heated 24 placed in the heating chamber 21. Cooked.
[0043]
In addition, when the high-frequency generating means 22 and the steam generating means 23 are operated simultaneously or alternately, the above-described contents are operated simultaneously or alternately, and according to the cooking sequence corresponding to the dish of each heated object. Heating is performed.
[0044]
Further, FIGS. 4A, 4B, and 4C show discharge states when steam is generated in Example 1 of the present invention. 4A shows a heated object 24 having a large steam spray angle and a large surface, FIG. 4B shows a heated object 24 having a small steam spray angle, and FIG. It is suitable for cooking the object to be heated 24 where it is desired to avoid spraying as much as possible.
[0045]
As described above, by having both the steam generating means 23 with high start-up performance and high energy utilization efficiency and the high-frequency generating means 22, it is possible to cook with moisture according to the object to be heated.
[0046]
【The invention's effect】
As described above, according to the present invention, the water in the water storage section is heated while being transported, and the heated hot water is vaporized, so that the steam generation efficiency is high and a small steam generation means can be obtained. Therefore, when the steam generating means that generates steam efficiently in a short time and the high frequency generating means are used in combination, the control pattern of the steam generating means and the high frequency generating means can be freely combined, and it takes less time and is heated. Cooking performance is improved by optimal cooking according to the food.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a high-frequency cooking device according to Embodiment 1 of the present invention. FIG. 2 is a configuration diagram of steam generating means according to Embodiment 1. FIG. 3 is an external view showing a cover and an ejection guide according to Embodiment 1. FIG. 4 is an external view showing a spray state of main attachments of a steam ejection part in Embodiment 1. FIG. 5 is a configuration diagram of a high-frequency heating cooking apparatus provided with steam generating means in a conventional example. FIG. FIG. 7 is a cross-sectional configuration diagram of a steam cooker in a conventional example. FIG. 8 is a cross-sectional configuration diagram of a coffee maker in a conventional example.
21 Heating chamber 22 High frequency generation means 23 Steam generation means 24 Object to be heated 30 Water storage tank (water storage section)
31 Seed heater (heating unit)
32 Evaporating part 37 Evaporating part cover 38 Ejecting guide 39 Ejecting part attachment

Claims (5)

A heating chamber for storing an object to be heated, high-frequency generating means for generating radio waves to be supplied to the heating chamber, steam generating means for supplying steam to the heating chamber, high-frequency generating means, and control means for the steam generating means The steam generating means heats a water storage section that stores water, a hot water transport section that transports water supplied from the water storage section, and an evaporation section that vaporizes the hot water transported by the hot water transport section. A high-frequency cooking apparatus that includes a heating unit and transports water by generating local boiling inside the transport unit by heat transfer from the heating unit. A heating chamber for storing an object to be heated, high-frequency generating means for generating radio waves to be supplied to the heating chamber, steam generating means for supplying steam to the heating chamber, high-frequency generating means, and control means for the steam generating means The steam generating means heats a water storage section that stores water, a hot water transport section that transports water supplied from the water storage section, and an evaporation section that vaporizes the hot water transported by the hot water transport section. A high-frequency cooking apparatus comprising a heating part, and a detachable evaporation part cover having an opening for discharging steam in the evaporation part . The high-frequency cooking apparatus according to claim 2, wherein the evaporating section cover is made of a metal body material . The high frequency heating cooking apparatus of Claim 2 provided with the ejection guide which can vary the ejection direction of the vapor | steam discharged from an opening part . The high-frequency cooking apparatus according to claim 4 , wherein the ejection guide is an attachable / detachable attachment so that the steam ejection state can be changed according to the shape of the object to be heated and the cooking method .

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